1-2 hours long

These activities take slightly longer, so are ideal when you have an hour or two, or even a whole afternoon, to dedicate to them.

Screenshot showing a home-made mask illusion

Hollow masks

Baffle your brain with the famous 'hollow mask illusion', and experiment with how it works by making your own.

Small, or far away?

Experiment with your perception of distance and size by making the amazing Ames room illusion.

Baffling body illusions

Confuse your body with eight illusions to experiment with your sense of 'proprioception'.


Create your very own hand-made animations, and learn about how we perceive motion.

girl in blue dress pouring paint over paper


Learn to make splatter pictures and experiment with trying to spot hidden images in random patterns.


Giant bubbles

Mei and her daughter Mischa learn why bubbles are always round and find out how to make giant bubbles with a couple of wooden spoons and some string.

Photo of Lorenzo, Alice and Aoife

Spaghetti towers

Aoife and her children Lorenzo and Alice become engineers for the day, building structures out of spaghetti and marshmallows, and investigating the properties of materials.

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Homemade parachutes

Jackie and her son Alex make a homemade parachute to transport an egg safely to the ground, and explore what it means to do a fair test.


Make an uncooked egg bounce!

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Rufus and the racers

Comedian Rufus Hound and his son Alby make soap powered boats and learn how soap affects the way water molecules hold onto each other.

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Colour changing cabbage juice

Andy and his nephews make a beautiful colour changing liquid from cabbage juice, and explore the science of indicator solutions.

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Making butter

Catherine and the Lurgan Brownies Group make butter from cream.

microwave cupcakes

Cakes in a cup

Investigate the chemistry of cakes by making microwave mug cakes and seeing what happens when you leave out key ingredients from the recipe.